Effects of two fungicide formulations on microbial and macroinvertebrate leaf decomposition under laboratory conditions
| Autor: | Adria A. Elskus, Michelle L. Hladik, Kelly L. Smalling, Kathryn M. Kuivila |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Amphipoda 010604 marine biology & hydrobiology Health Toxicology and Mutagenesis Hyalella azteca Biomass Aquatic animal 010501 environmental sciences Biology Pesticide biology.organism_classification 01 natural sciences Aquatic toxicology Fungicide Horticulture Botany Environmental Chemistry Ecosystem 0105 earth and related environmental sciences |
| Zdroj: | Environmental Toxicology and Chemistry. 35:2834-2844 |
| ISSN: | 0730-7268 2834-2844 |
| DOI: | 10.1002/etc.3465 |
| Popis: | Aquatic fungi contribute significantly to the decomposition of leaves in streams, a key ecosystem service. Little is known, however, about the effects of fungicides on aquatic fungi and macroinvertebrates involved with leaf decomposition. Red maple (Acer rubrum) leaves were conditioned in a stream to acquire microbes (bacteria and fungi) or leached in tap water (unconditioned) to simulate potential reduction of microbial biomass by fungicides. Conditioned leaves were exposed to fungicide formulations QUILT (azoxystrobin + propiconazole) or PRISTINE (boscalid + pyraclostrobin) in the presence and absence of the leaf shredder, Hyalella azteca (amphipods; 7-d old at start of exposures) for 14 d at 23 °C. The QUILT formulations (∼0.3 μg/L, 1.8 μg/L, and 8 μg/L) tended to increase leaf decomposition by amphipods (not significant) without a concomitant increase in amphipod biomass, indicating potential increased consumption of leaves with reduced nutritional value. The PRISTINE formulation (∼33 μg/L) significantly reduced amphipod growth and biomass (p |
| Databáze: | OpenAIRE |
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